Simplified flow injection slurry method for direct flame atomic absorption spectrometric determination of calcium, magnesium, sodium and potassium in fruits

1991 ◽  
Vol 57-58 (1) ◽  
pp. 489-493 ◽  
Author(s):  
J. L. Burguera ◽  
M. Burguera ◽  
Gladys Becerraa
Keyword(s):  
Atomic Absorption ◽  
Flow Injection ◽  
Flame Atomic Absorption ◽  
Calcium Magnesium ◽  
Slurry Method ◽  
Atomic Absorption Spectrometric ◽  
Sodium And Potassium

scholarly journals Determination of Calcium, Magnesium, Sodium, and Potassium in Foodstuffs by Using a Microsampling Flame Atomic Absorption Spectrometric Method After Closed-Vessel Microwave Digestion: Method Validation

2010 ◽  
Vol 93 (6) ◽  
pp. 1888-1896 ◽  
Author(s):  
Rachida Chekri ◽  
Laurent Noël ◽  
Christelle Vastel ◽  
Sandrine Millour ◽  
Ali Kadar ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Microwave Digestion ◽  
Performance Criteria ◽  
Internal Quality ◽  
Spectrometric Method ◽  
Closed Vessel ◽  
Flame Atomic Absorption ◽  
Calcium Magnesium ◽  
Sodium And Potassium

Abstract This paper describes a validation process in compliance with the NF/EN ISO/IEC 17025 standard for the determination of the macrominerals calcium, magnesium, sodium, and potassium in foodstuffs by microsampling with flame atomic absorption spectrometry after closed-vessel microwave digestion. The French Standards Commission (Agence Francaise de Normalisation) standards NF V03-110, NF EN V03-115, and XP T-90-210 were used to evaluate this method. The method was validated in the context of an analysis of the 1322 food samples of the second French Total Diet Study (TDS). Several performance criteria (linearity, LOQ, specificity, trueness, precision under repeatability conditions, and intermediate precision reproducibility) were evaluated. Furthermore, the method was monitored by several internal quality controls. The LOQ values obtained (25, 5, 8.3, and 8.3 mg/kg for Ca, Mg, Na, and K, respectively) were in compliance with the needs of the TDS. The method provided accurate results as demonstrated by a repeatability CV (CVr) of <7 and a reproducibility CV (CVR) of <12 for all the elements. Therefore, the results indicated that this method could be used in the laboratory for the routine determination of these four elements in foodstuffs with acceptable analytical performance.

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